Hydrogen-bonding-directed helical nanofibers in a polythiophene-based all-conjugated diblock copolymer

Soft Matter ◽  
2018 ◽  
Vol 14 (28) ◽  
pp. 5906-5912 ◽  
Author(s):  
Huina Cui ◽  
Xiaosong Chen ◽  
Yue Wang ◽  
Dacheng Wei ◽  
Feng Qiu ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Hydrogen Bonding ◽  
Aspect Ratio ◽  
Charge Transport ◽  
Transport Properties ◽  
Diblock Copolymer ◽  
Large Aspect Ratio ◽  
Pyridine Solution ◽  
Superior Mechanical Properties

Helical nanofibers with a large aspect ratio were crafted from an achiral all-conjugated diblock copolymer, P3HT-b-P3HHT, in an aged pyridine solution. Such helical nanofibers exhibit superior mechanical properties and charge transport properties.

Supramolecular P4VP-pentadecylphenol naphthalenebisimide comb-polymer: mesoscopic organization and charge transport properties

2014 ◽  
Vol 2 (32) ◽  
pp. 6511-6519 ◽  
Author(s):  
Rekha Narayan ◽  
Prashant Kumar ◽  
K. S. Narayan ◽  
S. K. Asha
Keyword(s):  
Hydrogen Bonding ◽  
Charge Transport ◽  
Transport Properties ◽  
Polymer Complex ◽  
Vinyl Pyridine ◽  
Comb Polymer

A supramolecular comb polymer complex of unsymmetric naphthalenebisimide with poly(4-vinyl pyridine) via hydrogen bonding – P4VP(PDP-UNBI)n – led to highly ordered layered assembly with improved nanoscale packing of the semiconductor moieties and improved electron mobilities.

scholarly journals Engineering polymers with improved charge transport properties from bithiophene-containing polyamides

2020 ◽  
Vol 8 (18) ◽  
pp. 6281-6292
Author(s):  
Bilal Özen ◽  
Nicolas Candau ◽  
Cansel Temiz ◽  
Ferdinand C. Grozema ◽  
Farzaneh Fadaei Tirani ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Charge Transport ◽  
Transport Properties ◽  
Semiconducting Properties ◽  
Engineering Polymers

Incorporation of bithiophene segments in the polyamides results in semiconducting properties, while mechanical properties of typical engineering polyamides are maintained.

Thermoreversible Crosslinking Rubber Using Supramolecular Hydrogen Bonding Networks

2002 ◽  
Vol 75 (4) ◽  
pp. 713-723 ◽  
Author(s):  
Keisuke Chino ◽  
Makoto Ashiura ◽  
Junichiro Natori ◽  
Masahiro Ikawa ◽  
Tetsuji Kawazura
Keyword(s):  
Mechanical Properties ◽  
Hydrogen Bonding ◽  
Solid Phase ◽  
Thermoplastic Elastomers ◽  
Scanning Calorimetry ◽  
Elongation At Break ◽  
Vulcanized Rubber ◽  
Superior Mechanical Properties ◽  
Hydrogen Bonding Networks ◽  
Isoprene Rubber

Abstract Thermoreversible crosslinking rubber (TRC-IR) was easily synthesized by modification of isoprene rubber (IR) with maleic anhydride followed by the addition of 3-amino-1,2,4-triazole (ATA), in solid phase. The mechanical properties of the resulting rubber were more similar to the sulfur-vulcanized rubber than general thermoplastic elastomers (ex. SEBS). Although the tensile strength and elongation at break were lower than those of a corresponding sulfur-vulcanized rubber, the moduli were as high as those of sulfur-cured rubber. Re-molding of TRC-IR could be repeated more than 10 times without significantly changing its mechanical properties. Differential scanning calorimetry (DSC) and infrared analyses revealed that the superior mechanical properties and good recyclability are attributable to the strong hydrogen bonding. The TRC-IR showed an endothermic transition peak at around 185 °C on the DSC chart, indicating cleavage of the hydrogen bonding. Infrared analyses also revealed that the absorption peaks of carboxylic acid were shifted to a lower region by the strong hydrogen bonding. The thermoreversible crosslinking system was also applied to EPM, EBM (ethylene-butene rubber), and IIR. These rubbers also showed superior mechanical properties as well as excellent recyclability.

The influence of hydrogen bonding on the preparation and mechanical properties of PS-diblock copolymer blends

2004 ◽  
Vol 42 (11) ◽  
pp. 2137-2160 ◽  
Author(s):  
I. A. Van Casteren ◽  
R. A. M. Van Trier ◽  
J. G. P. Goossens ◽  
H. E. H. Meijer ◽  
P. J. Lemstra
Keyword(s):  
Mechanical Properties ◽  
Hydrogen Bonding ◽  
Diblock Copolymer ◽  
Copolymer Blends

Metallic Nanoneedles Arrays for TEM Sample Preparation “Lift-Out”

2012 ◽  
Author(s):  
Romaneh Jalilian ◽  
David Mudd ◽  
Neil Torrez ◽  
Jose Rivera ◽  
Mehdi M. Yazdanpanah ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Electron Microscope ◽  
Sample Preparation ◽  
Focused Ion Beam ◽  
Ion Beam ◽  
Beam System ◽  
Transmission Electron ◽  
Nanoneedle Array ◽  
Superior Mechanical Properties ◽  
And Performance

Abstract The sample preparation for transmission electron microscope can be done using a method known as "lift-out". This paper demonstrates a method of using a silver-gallium nanoneedle array for a quicker sharpening process of tungsten probes with better sample viewing, covering the fabrication steps and performance of needle-tipped probes for lift-out process. First, an array of high aspect ratio silver-gallium nanoneedles was fabricated and coated to improve their conductivity and strength. Then, the nanoneedles were welded to a regular tungsten probe in the focused ion beam system at the desired angle, and used as a sharp probe for lift-out. The paper demonstrates the superior mechanical properties of crystalline silver-gallium metallic nanoneedles. Finally, a weldless lift-out process is described whereby a nano-fork gripper was fabricated by attaching two nanoneedles to a tungsten probe.

Annealing-Induced Morphological Changes in Nanocrystalline Quantum Dots and Their Impact on Charge Transport Properties

2011 ◽  
Vol 41 (3) ◽  
pp. 524-529 ◽  
Author(s):  
Sushmita Biswas ◽  
David J. Gosztola ◽  
Gary P. Wiederrecht ◽  
Michael A. Stroscio ◽  
Mitra Dutta
Keyword(s):  
Quantum Dots ◽  
Charge Transport ◽  
Transport Properties ◽  
Morphological Changes
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